WO2015044548A1

WO2015044548A1 - Device for fastening an object on a support plate and obtained assembly

Info

Publication number: WO2015044548A1
Application number: PCT/FR2014/052125
Authority: WO
Inventors: Jérôme PAQUET
Original assignee: A.Raymond Et Cie
Priority date: 2013-09-24
Filing date: 2014-08-26
Publication date: 2015-04-02
Also published as: CN105579651A; FR3011026A1; US10030684B2; US20160356298A1; ES2654772T3; CN105579651B; EP3049599A1; FR3011026B1; EP3049599B1

Abstract

The invention relates to a device (1) for fastening an object (100) on a support plate (200) and the obtained assembly, and comprises a hollow body (2) rigidly connected to the support plate (200), a slider (3) rigidly connected to the object (100) and able to be engaged in the hollow body (2), and locking means (15, 33; 37, 38). The locking means (15, 33) comprise at least one side opening (15) passing through the hollow body (2) and an elastically deformable locking tab (33) supported by the slider (3) and designed, during engagement of the slider (3) in the hollow body (2), to deploy laterally in the side opening (15) and designed to come to rest simultaneously below the support plate (200) to oppose any longitudinal removal of the slider (3), and on the slider (3) to oppose any longitudinal thrust of the slider (3), and thus to define a first locking position.

Description

DEVICE FOR FIXING AN OBJECT ON A SUPPORT PLATE AND ASSEMBLY OBTAINED

Technical area

The invention relates generally to a device for fixing an object on a support plate, for example to fix an object in the passenger compartment of a motor vehicle. The invention also relates to an assembly obtained with such a fixing device.

Prior art

This type of fastening devices must ensure effective anchoring, in particular to withstand a frontal impact to prevent the object and / or the fastener from becoming a projectile. In order to ensure maintenance, the fixing device must however be easily removable.

The publication FR 2 852 996 describes such a fixing device comprising a hollow body adapted to be secured to a support plate and a slide adapted to be secured to the object to be fixed and to be housed in the hollow body. The hollow body and the slide are provided with locking means capable of locking the slide longitudinally in the hollow body after a first longitudinal thrust forcing the engagement of the slide in the hollow body, and able to unlock the slide relative to the hollow body after a second longitudinal thrust on the slide. The fixing device comprises a spring provided between the hollow body and the slide and longitudinally biasing the slide towards the outside of the hollow body. The locking means comprise a flexible tab adapted to be deformed laterally, formed by the hollow body and whose end is provided with a camming finger. The locking means also comprise a cam carried by the slide and adapted to guide the cam finger. For this purpose, the cam comprises a central island whose periphery forms a cam path guiding the cam finger. This central island has a recess defining a locking position in which said cam finger prevents the longitudinal withdrawal of the slider relative to the hollow body. Thus, the locking of the slider in the hollow body is obtained by a first longitudinal thrust of the slide in the hollow body during which the flexible tab is deformed by the cam follower following the cam path. When the cam finger reaches the recess, the flexible tab relaxes. The spring urges the slide in the direction of its withdrawal until the locking of the cam finger in the locking position in the recess of the cam. The object is thus secured to the support plate. The unlocking of the slider is obtained by a second longitudinal thrust on the slider during which the cam follower moves longitudinally away from the recess until it encounters a relief that laterally deforms the flexible tab by laterally shifting the camming pin of the recess. To be able to accommodate the cam follower in the recess and then to apply the second longitudinal thrust, the object must not necessarily be already pressed against the support wall. Thus, when the slide is in its locking position, there is a longitudinal functional clearance between the object and the support plate allowing a longitudinal thrust later. After the second longitudinal thrust, during release, the spring causes the withdrawal of the slider relative to the hollow body, the cam follower then freely circulates on the lateral side of the i lot central. The slide is then free to be extracted from the hollow body, the object is thus disengaged from the support plate.

Publication US 2008/0 211249 discloses a substantially similar fastening device in which the slider further comprises flexible jaws for, when the slider engages in the hollow body, to approach one towards the another to enclose between them the object to be fixed to the support plate.

These fasteners have several major disadvantages. In the first place, they require a large number of parts and are complex to manufacture. Their assembly is delicate, the spring to be held in place in the hollow body before and at the beginning of the engagement of the slide. Second, each of these fasteners requires that a functional longitudinal play between the object and the support plate persists once the locking is achieved. If such a longitudinal functional clearance does not persist, no unlocking can be obtained without breaking one or more parts of the fastener. Because of this longitudinal functional clearance, the object may inadvertently be brought closer to the plate and cause the unlatched unlocking of the slide. In addition, this longitudinal functional game can induce an impression of insecurity of the attachment for the user who finds that the object can move, for example when subjected to vibrations related to speed variations and irregularities of the road. Furthermore, in the event of impact, the fastening is of the "all or nothing" type, namely that either the elements (in particular the flexible tab) resist the pulling force and the object remains secured to the support plate, either one of the elements breaks and the object is free to move relative to the support plate. Finally, these devices do not make it possible to highlight an attempt to tear that would not have resulted in the separation of the object but could have weakened the mechanical strength of the parts.

The publication DE 10 2005 052736 discloses a pusher device for opening and closing the lid of an object storage compartment.

Presentation of the invention

The object of the invention is to overcome these disadvantages by providing a device for fixing an object on a support plate, easy to manufacture, to assemble and to use, providing a reliable and removable secure fastening, without functional longitudinal play, allowing in case of shock not to completely separate the object of the support plate and to testify to any attempt to tear it off; as well as an assembly obtained.

For this purpose, the subject of the invention is a device for fixing an object on a support plate, comprising a hollow body intended to be housed in an engagement opening of the support plate and provided with means anchoring device adapted to secure it to the support plate, a slide adapted to be successively engaged and extracted relative to the hollow body and provided with hooking means adapted to secure it to the object, locking means arranged for:

by applying a first longitudinal thrust on the slider, in a first step, allow the longitudinal engagement of the slider in the hollow body and, in a second step, tend to keep the slider locked longitudinally relative to the hollow body in a first locking position in which it can not be engaged longitudinally beyond the first blocking position,

by applying a first longitudinal withdrawal force on the slide following the first longitudinal thrust, partially retract and, in a first step, unlock the slide of the first locking position and allow its partial withdrawal relative to the hollow body then from the first locking position, in a second step, longitudinally block the slide in a second locking position offset longitudinally with respect to the first position and in which it can not be removed from the hollow body and can be engaged longitudinally beyond the second blocking position.

characterized in that the locking means comprise at least one lateral opening through the hollow body and an elastically deformable locking lug carried by the slide and intended, during the engagement of the slide in the hollow body, to deploy laterally in the lateral opening and support simultaneously under the support plate to oppose any longitudinal withdrawal of the slide, and on the slide to oppose any longitudinal thrust of the slide, and thus define said first locking position.

The idea underlying the invention is to provide a double fastening system allowing, on the one hand, after the first longitudinal thrust, to fix the plunger against the hollow body, thus eliminating any functional play and preventing any additional longitudinal engagement; on the other hand, after a partial withdrawal of the slide, to maintain the slide connected to the hollow body to avoid the complete recess of the object. In addition, the shock is indicated by the partial removal of the slider relative to the hollow body. It is thus possible to know that the fixing device has been shocked and to intervene accordingly.

The fixing device according to the invention may advantageously have the following particularities:

said locking means are arranged for:

by applying a second longitudinal thrust on the slide following the first longitudinal withdrawal force, retract partially and longitudinally block the slide relative to the hollow body in the first locking position;

by applying a second longitudinal withdrawal force on the slider succeeding the second longitudinal thrust, retract completely to unlock the slider of the first position and allow its total withdrawal relative to the hollow body;

the locking means comprise a flexible tab provided with at least one cam and one cam carried by the slider, the other by the hollow body, the cam having a central island defining a guide path suitable for to guide the cam finger and provided with an engagement portion for guiding the cam finger when engaging the slide in the hollow body to its first locking position, a clearance portion for guiding the finger of the cam cam during removal of the slide relative to the hollow body after the second locking position, a recess separating the engagement and disengagement portions and for receiving the cam finger and to define the second locking position; the cam comprises a stop pin, longitudinally offset relative to the central b lot and provided longitudinally opposite the recess, the slider is arranged so that, in the first locking position, the cam is longitudinally opposite the stop pin and pressed by the flexible tab against the stop pin which prevents its passage from the engagement portion to the clearance portion and thus defines a waiting position of the cam finger;

the central batch comprises a flexible finger arranged to prevent the insertion of the cam finger into the disengagement portion when the slide is engaged in the hollow body and to allow the release of the cam finger from the disengagement portion during the removal of the slider relative to the hollow body;

the flexible tab is carried by the slide and the cam is carried by the hollow body;

the slide comprises two flexible jaws defining between them a longitudinal recess for receiving the object and to block them by tightening to form the attachment means;

the hollow body comprises at least one plate extending laterally and intended to bear on the support plate, a flexible hook laterally adapted to retract during the passage of the hollow body in the engagement opening and to deploy under the support plate when the plate is resting on the support plate to block the support plate between the plate and the flexible hook and form the anchoring means;

the flexible tab has an inverted T-shape, the width of the T-shaped shank is smaller than that of the jaws, the T-shaped shank forms on either side of the T-shaped shank , a cam finger, the hollow body comprises two cams provided on either side of a median plane of the hollow body, symmetrical to each other with respect to the median plane and each intended to receive one of the cam fingers; the slider is formed by a folded sheet, each jaw has an inverted U shape whose ends of the inner limbs facing each other are interconnected by a base so as to define therebetween a U-shape defining the longitudinal recess, a outer branch of a jaw opposite to the other jaw is extended longitudinally by a flat portion forming the flexible leg;

the free ends of each outer branch of the inverted U shape of each jaw each comprise a flap folded towards the corresponding inner branch of the inverted U shape, the free ends of each inner branch of said inverted U shape of each jaw comprise each a notch housing the corresponding flap and arranged to, when the slide is subjected to the first, second longitudinal withdrawal force, receive the support of the flap and prevent the unfolding of the outer branches relative to the inner branches;

the slider comprises at least one locking slat extending from the base defining the longitudinal recess and arranged to, when the slider is subjected to the first, second longitudinal withdrawal force, bear against the free ends of the outer branches and prevent the unfolding the inner branches relative to the outer branches;

the hollow body comprises a first and a second body portion adapted to be mounted or disassembled from each other.

The invention also extends to an assembly of an object on a support plate provided with an engagement opening, characterized in that it comprises a fixing device as described, the hollow body being housed in the opening engagement and secured to the support plate by the anchoring means, the object being secured to the slide by the attachment means. Brief presentation of the drawings

The present invention will be better understood and other advantages will appear on reading the detailed description of an embodiment taken by way of non-limiting example and illustrated by the appended drawings, in which:

Figure 1 is an exploded perspective view of the fixing device according to the invention;

Figure 2 is a perspective view in section along a longitudinal median plane of the slider of the fixing device of Figure 1;

Figure 3 is a perspective view in section of the hollow body of the fixing device of Figure 1;

Figures 4 to 6 are side views and in section along a longitudinal median plane of the fixing device according to the invention, illustrating the fixing steps;

Figures 7 to 9 are side views and in section along a longitudinal median plane of the fixing device according to the invention, illustrating the steps of uncoupling;

Figures 10 and 1 1 are side views according to another embodiment of the invention.

Description of the embodiments

The fixing device according to the invention is intended for fixing an object on a support such as, for example, a support plate or any other similar type of support. This fixing device thus allows, for example, the attachment of an object in the passenger compartment of a motor vehicle or any other type of attachment.

In the example illustrated, in particular in FIG. 1, the fixing device 1 is used to fix an object 100 on a support plate 200. In this example, the object 100 has a double T-shape whose rods 101 are connected. between them by a central rib 102 traversed by a light 103 and whose branches 104 are connected by a rib transverse 105 forming with the branches 104 a head. The free end of the central rib 102 has a beveled shape 106 to facilitate the attachment of the object 100. This object 100 is for example an intermediate piece for fixing another element (not shown). The support plate 200 has an engagement opening 201, for example of rectangular shape, delimited by a boss 202 provided with two lugs 203 for indicating the mounting direction.

With reference to FIG. 1, the fastening device 1 according to the invention comprises a hollow body 2 and a slider 3 designed to cooperate with one another as well as with the support plate 200 and the object 100 to fasten this denier to the plate support 200.

The hollow body 2 detailed in FIG. 3 is intended to be introduced longitudinally into the engagement opening 201 of the support plate 200. The hollow body 2 extends longitudinally along the longitudinal axis A and has a substantially parallelepipedal cross-section. defined by two side walls 4 and two transverse walls 5 facing each other in pairs, interconnected and defining between them a housing 6 for receiving the slider 3 described below. The parallelepipedal section of the hollow body 2 is adapted to the shape of the engagement opening 201 of the support plate 200. Thus, the hollow body 2 may have any other section adapted to another form of engagement opening 201. One end of the hollow body 2 is closed by a bottom tongue 7 interconnecting the side walls 4 by providing with the transverse walls 5 two bottom openings 70 (only one of which is visible), allowing, on both sides other of the bottom tongue 7, access to the housing 6. These bottom openings 70 are used during the manufacture of the fixing device 1, in particular for the cam described below. The other end of the hollow body 2 is open and provided with two plates 8 each carried by one of the transverse walls 5 and extending perpendicularly to the longitudinal axis A to form a bearing surface S intended to bear on the boss 202 of the support plate 200. The plates 8 are separated from each other by an engagement slot 9 (visible in Figure 1) for receiving the head of the object 100 when it is fixed on the support plate 200. A lateral end of each plate 8 has a recessed shape 10, complementary to the corresponding lug 203, provided on the support plate 200, the other end comprises a solid shape, symmetrical by relative to the longitudinal axis A to the recessed form 10. Thus, the hollow body 2 can be engaged only in a predetermined direction in the engagement opening 201 of the support plate 200.

Each transverse wall 5 further comprises a flexible hook 1 1 protruding towards the outside of the hollow body 2 and able to deform elastically laterally during the introduction of the hollow body 2 into the engagement opening 201. The flexible hooks 11 are each formed by an inverted U-shaped rib 12 (visible in FIG. 1) extending transversely of the transverse wall 5 and whose edges are inclined so that their height with respect to the transverse wall 5 at the free ends of the U-shape is less than their height at the base of the U-shape. Each transverse wall 5 has an inverted U-shaped cutout 13 imparting flexibility to the flexible hook 1 1 carrying the rib 12. Each plate 8 comprises a recess 14 provided longitudinally opposite the corresponding flexible hook 1 1 and allowing access to the flexible hooks January 1, from the inside of the hollow body 2, for example for the dismantling of the hollow body 2 of the support plate 200 forcing the flexion of the flexible hooks 1 1.

Each side wall 4 is traversed by a lateral opening 15 opening into the engagement slot 9. The lateral opening 15 is delimited longitudinally by a bearing edge 16 opposite the engagement slot 9, and transversely by webs 17 protruding towards the outside of the hollow body 2 and inclined to approach the longitudinal axis A away from the plates 8. One of the side walls 4 has two cam openings 18 aligned with each other longitudinally and provided between the edge of the support 16 and the bottom tongue 7, and whose function is described later.

Each transverse wall 5 carries a cam formed by a central island 19 provided without contact between the transverse walls 4 to define a peripheral guide path. The central island 19 has an inclined face 20 turned towards the plates 8 and inclined so that the distance separating it from the plates 8 increases progressively away from the lateral face 4 having the cam openings 18 towards the other side face 4 not having a cam opening. On either side of the inclined face 20, the central island 19 comprises two longitudinal faces 21, 22 defining an engagement portion of the guide path and a clearance portion of the guide path. The central island 19 carries a flexible finger 23 provided at the tip of the central island 19 between the engagement portion defined by the longitudinal portion 21 and the inclined face 20. This flexible finger 23 is not in contact with the corresponding transverse wall 5 and extends in alignment with the inclined face 20 through the cam opening 18. Thus, the flexible finger 23 is interposed to any longitudinal introduction into the clearance portion from the decks 8. The flexible finger 23 may deform when subjected to stress forces. Opposite the inclined face 20, the central island 19 has a recess 24 separated from the engagement portion by a prominent engagement nose 25 longitudinally with respect to the recess 24, and separated from the clearance portion by a nose clearance device 26 also protrudes longitudinally with respect to the recess 24. The recess 24 has an inclination substantially similar to that of the inclined face 20. The cam comprises a stop stud 27 carried by the bottom tongue 7 and oriented longitudinally towards the recess 24 This stop stud 27 has a stop face substantially parallel to the longitudinal axis A.

The cams are symmetrical with each other with respect to a median plane passing through the longitudinal axis A and through the center of the lateral openings 15.

The slider 3 detailed in Figure 2 is intended to be secured to the object 100 and engaged longitudinally in the housing 6 of the hollow body 2. The slider 3 comprises deformable jaws 28 facing each other and defining between them a longitudinal recess 29 intended to receive the object 100 and to block it.

The jaws 28 are arranged for, during the longitudinal engagement of the slider 3 in the hollow body 2, to approach one another and reduce the width of the longitudinal recess 29 to grip the object 100. Moreover each jaw 28 has a tooth 30 facing the opposite jaw 28 and intended to be housed in the light 103 of the object 100 during the deformation of the corresponding jaw 28. The teeth 30 are advantageously provided laterally staggered so as not to interfere with each other during this approximation. The width of the lumen 103 is provided to receive the two teeth 30 side by side.

The slider 3 is formed by a folded sheet. Thus, each jaw 28 is formed by a portion of the inverted U-shaped folded sheet. The ends of the inner branches 31 of this inverted U-shape facing each other are interconnected by a base 32 so that the jaws 28 define a U-shape between them. Thus, the inner branches 31 define the longitudinal recess 29 and carry the teeth 30 formed by cutting and folding the sheet.

Each jaw 28 comprises a pair of elastically deformable locking tabs 33 carried by the outer branches 34 of the inverted U-shape. Each locking lug 33 has a V shape whose tip is oriented laterally opposite the longitudinal recess 29 so as to define a first panel 35 oriented towards the base of the slider 3 and a second panel 36 oriented to the opposite to the base of the slider 3. Each pair of locking tabs 33 is formed by cutting and folding the sheet with the end of the first panel 35 opposite the tip of the V-form integral with the outer branch 34, and end of the second panel 36 opposite the tip of the free V shape in motion. Each locking tab 33 is elastically deformable so that the tip of the V-shaped is more or less prominent relative to the face of the corresponding outer branch 34. The slider 3 comprises a flexible tab 37 formed by a flat portion longitudinally extending the outer branch 34 of one of the jaws 28. The flexible tab 37 has an inverted T shape, the base of the rod is integral with the corresponding jaw 28 and whose bar is free. The free ends of the T-shaped bar form cam fingers 38. At the free end of the flexible tab 37, the sheet is folded to increase the mechanical strength of the cam fingers 38. The width of the rod is the T-shape is less than the width of the corresponding jaw 28.

The free ends of each outer branch 34 of jaw 28 each comprise a flap 39 folded towards the corresponding inner branch 31. Moreover, the free ends of each inner leg 31 of jaw 28 each comprise a notch 40 housing the corresponding flap 39.

Finally, the slider 3 comprises two locking strips 41 provided on either side of the base 32 to which they have secured. These locking strips 41 protrude from the base 32 to pass under the flaps 39 described above.

Prior to the attachment of the object 100 to the support plate 200, the hollow body 2 is pre-assembled on the support plate 200 and the object 100 to the slide 3. To do this, the hollow body 2 is introduced longitudinally into the 201 engagement opening of the support plate 200 until the plates 8 are supported on the boss 202. At this introduction, the edges of the engagement opening 201 resiliently deform the flexible hooks 1 1 1 to each other. Once the flexible hooks 1 1 have crossed the thickness of the support plate 200, they unfold outwardly, bearing under the support plate 200. In this pre-assembly position, the plates 8 are supported on the support plate 200. Thus, the plates 8 and the flexible hooks 1 1 wedge the support plate 200 and form anchoring means solidarisant the hollow body 2 to the support plate 200. Moreover, the object 100 is introduced longitudinally in the longitudinal housing 29 of the slider 3 until the object 100 abuts against the base 32 of the slider 3. In this position, the teeth 30 coincide longitudinally with the light 103 of the object 100.

Fixing the object 100 on the support plate 200 is described below with reference to FIGS. 4 to 6. This fixation is obtained by a first longitudinal thrust illustrated by the arrow P1 and applied on the slider 3 relative to the hollow body. 2.

After the pre-assembly, with reference to FIG. 4, the slider 3 carrying the object 100 is presented opposite the housing 6 of the hollow body 2 carried by the support plate 200 so that the recessed shapes 10 are longitudinally opposite the 203. It is thus on the orientation of the cam and in particular the position of the flexible finger 23. In the process, the slider 3 is engaged longitudinally in the hollow body 2 so that the flexible tab is oriented towards the flexible finger 23. At the beginning of the longitudinal engagement, the flexible tab 37 is elastically deformed along the arrow F1 and bears against the side wall of the hollow body 2. Then, the cam fingers 38 come into contact with the flexible fingers 23 which deflect them by deforming the flexible tab 37 according to the same arrow F1, thus preventing the cam fingers 38 from engaging in the clearance portions of the cam delimited by the longitudinal flaps 21.

The longitudinal commitment is continued. At the passage of the engagement opening 201 in the support plate 200, the jaws 28 are elastically deformed towards each other according to the arrows F2, the teeth 30 being introduced on either side of the object 100 in the light 103. Thus, the object 100 is secured to the slider 3 by the teeth 30 forming the attachment means of the object 100 to the hollow body 2.

With reference to FIG. 5, the longitudinal engagement is continued. The locking tabs 33 are elastically deformed towards each other at the passage of the engagement opening 201 of the support plate 200 according to the arrows F3. The cam fingers 38 run along the inclined faces 20, the flexible tab 37 extending its elastic deformation according to the arrow F1, the cam fingers 38 then engaging in the engagement portions delimited by the longitudinal panels 22.

Referring to Figure 6, after the passage of the support plate 200, the locking tabs 33 are deployed through the lateral openings 15 according to the arrows F4, bearing under the support plate 200 and against the slider 3. The first pieces Blocking tabs 33 bear against the webs 17 of the slider 3 and urge the longitudinal withdrawal of the slider 3 with respect to the hollow body 2. At the same time, the second panels 36 of the locking tabs 33 bear against the support plate 200 and urge the slider 3 in its direction of engagement. Thus, the slider 3 is stationary, in a first longitudinal locking position in which its longitudinal withdrawal is limited by the locking tabs 33 and the continuation of its longitudinal engagement prevent by the support of the plates 8 against the support plate 200 and the object 100 against the support plate 200. Thus, in this first locking position, the object 100 is secured to the support plate 200. Moreover, in this first locking position of the slide 3, the cam fingers 38 are released from the engagement portion, the flexible tab 37 tends to fall back, the cam fingers 38 bypass the engaging nose 25. The flexible tab 37 bears against the stopper 27 according to the arrow F5. The stopper 27 holds the cam fingers 38 in a waiting position, preventing them from directly reaching the cam path clearance portion.

In this first blocking position, the object 100 is secured to the support plate 200 against which it is plated, without residual clearance. Any new longitudinal thrust is prevented.

The separation of the object 100 from the support plate 200 is described hereinafter with reference to FIGS. 7 to 9. This separation involves two distinct successive steps, namely, the application on the slider 3 of a first effort of longitudinal withdrawal from the body hollow 2 illustrated by the arrow R1, then the application on the slider 3 of a second longitudinal thrust relative to the hollow body 2 illustrated by the arrow P2 and finally the application on the slider 3 of a second longitudinal withdrawal force illustrated by the arrow R2. The first longitudinal withdrawal force can intervene, either during an impact during which the inertia of the object 100 subjects the slider 3 to a longitudinal withdrawal force, or intentionally by direct or indirect traction on the slider 3.

With reference to FIG. 7, the slider 3 subjected to this first longitudinal shrinkage force R1 moves longitudinally relative to the hollow body 2 by a first withdrawal stroke during which, on the one hand, the locking tabs 33 deform at the passage of the engagement opening 201 of the support plate 200 to retract according to the arrows F5 and, secondly, the flexible tab 37 is disengaged longitudinally from the stop pin 27, the cam fingers 38 housed in the recesses 24 central islands 19 according to the arrow F6. The withdrawal of the slider 3 is partial, the further withdrawal under the effect of a withdrawal force is prevented by the cam fingers 38 locked in the recesses 24 thus defining a second longitudinal locking position.

To be able to remove the slider 4 from the hollow body 2, with reference to FIG. 8, it is advisable to apply to the slider 3 a second longitudinal thrust relative to the hollow body 2, illustrated by the arrow P2. During this second longitudinal thrust P2, the locking tabs 33 redeploy under the support plate 200 according to the arrows F6. The flexible tab 37 tending to fall back, the cam fingers 38 bypass the release noses 26 to be placed in the clearance portion according to the arrow F7. The slider 3 is then no longer in its second locking position but is maintained again in the first locking position. The slider 3 can then be extracted, as illustrated in FIG. 9 by means of a second longitudinal withdrawal force applied to the slider 3 and illustrated by the arrow R2.

During this withdrawal, at the passage of the engagement opening 201 of the support plate 200, the locking tabs 33 deform to retract according to the arrows F8 before being re-deployed above the support plate 200 according to the arrows F9. The cam fingers 38 freely circulate in the clearance portion to the flexible finger 23 which they force the flexion along the arrow F10 before continuing their movement along the side wall 4 of the hollow body 2. The slider 3 can be completely withdrawn from the hollow body 2. Once the slider 3 has been extracted, the object 100 can be detached from the slider 3 by spacing the jaws 28, the teeth 30 then releasing the light 103. The hollow body 2 can be detached from the support plate 200 by introducing a tool in the recess 14 and forcibly folding the flexible hooks 1 1 towards the longitudinal axis A.

After fixing, when the slider 3 is subjected to a tensile force, each flap 39 of outer branch 34 of jaw 28 abuts against a ridge of the corresponding notch 40 and prevents the unfolding of the outer branches 34 relative to the inner limbs 31. Similarly, each locking strip 41 bears under the corresponding flap 39 and prevents the unfolding of the inner branches 31 relative to the outer branches 34. Thus, the mechanical strength of the slider 3 is optimal.

According to another embodiment of the invention, shown in Figures 10 and 1 1, the hollow body 2 is formed by an assembly of the first and second body parts 41 and 42. Thus, before being assembled, each part the hollow body 2 can be stored separately so as to limit the storage volume, especially during transport. The two parts 41 and 42 comprise a locking / unlocking system to enable the assembly or disassembly of the hollow body 2. This system comprises centering pins 43 placed on at least one of the two body parts 41, 42 and orifices, not shown, designed to receive the centering pins, placed symmetrically with respect to the centering pins 43 on the opposite body portion.

The body portion 41 includes one of the two transverse walls 5 and a portion of each of the two side walls 4. The body portion 42 comprises when it the other transverse wall 5 and a portion of each of the side walls 4 completing the portions of the body portion 41. The portions of opposite side walls of the two body parts being symmetrical along the axes B and C.

The transverse wall 5 of the hollow body 2 comprises in this embodiment a control opening 44 from which it is possible to observe a deformation of the flexible finger 23. The flexible finger 23 is separated from the central island 19 and is fixed against the side wall 4 without passing into the cam aperture 18 not present in this embodiment. The finger is arranged so as to follow the extension of the inclined pan 20.

A space d1 between the flexible finger 23 and the central island 19 allows the displacement of the cam finger 28 in the disengagement portion, along the side wall 4. The flexible finger is thus deformed by the stress exerted by the finger of cam 28.

The invention achieves the previously mentioned objectives. Indeed, it is clear from the description that the fixing of the object 100 on the support plate 200 is obtained by a first longitudinal thrust P1 and the disengagement can occur only after a first longitudinal withdrawal force R1 followed by a second longitudinal thrust P2 and a second longitudinal withdrawal force R2. Thus, any inadvertent disassembly is made impossible. In addition, when the attachment is shocked, the attachment device 1 moves from its first locking position to the second locking position in which the slider 3 is longitudinally displaced relative to the hollow body 2. The position of the slider 3, in extracted part of the hollow body 2, thus testifies that the fixing device 1 has suffered a shock. Thus, the fixing device 1 can be changed, repaired or simply checked. The fact that after a shock the object 100 remains attached to the support plate 200 prevents it from turning into a dangerous projectile. The fastening device 1 according to the invention thus has a double fastening system that makes its use more reliable. It goes without saying that the present invention can not be limited to the foregoing description of one of its embodiments, may undergo some modifications without departing from the scope of the invention.

Claims

1. Device (1) for fixing an object (100) to a support plate (200), comprising a hollow body (2) intended to be housed in an engagement opening (201) of said support plate (200) and provided with anchoring means (8, 1 1) adapted to secure it to said support plate (200), a slider (3) adapted to be successively engaged and extracted relative to said hollow body (2) and provided with hooking means (30) adapted to secure it to said object (100), locking means (15, 33; 19, 24, 27, 37, 38) arranged for:

by applying a first longitudinal thrust (P1) on said slider (3), in a first step, allowing longitudinal engagement of said slider (3) in said hollow body (2) and, in a second step, tending to maintain said slider (3) locked longitudinally with respect to said hollow body (2) in a first locking position in which it can not be engaged longitudinally beyond said first locking position, by applying a first longitudinal withdrawal force ( R1) on said slide (3) succeeding said first longitudinal thrust (P1), retract partially and, in a first step, unlock said slide (3) of said first locking position and allow its partial withdrawal relative to said body hollow (2) from said first locking position and then, in a second step, longitudinally locking said slide (3) in a second locking position offset longitudinally by r supplying said first position and in which it can not be removed from said hollow body (2) and can be engaged longitudinally beyond said second blocking position,

characterized in that said locking means (15, 33) comprise at least one lateral opening (15) passing through said hollow body (2) and an elastically deformable locking tab (33) carried by said slide (3) and intended for, when engaging said slider (3) in said hollow body (2), deploy laterally into said side opening (15) and intended to bear simultaneously under said support plate (200) to oppose any longitudinal withdrawal of said slider (3), and on said slider (3) to oppose any longitudinal thrust of said slider (3), and thus to define said first blocking position.

2. Fastening device (1) according to claim 1, characterized in that said locking means are arranged for:

by applying a second longitudinal thrust (P2) on said slider (3) succeeding said first longitudinal withdrawal force (R1), partially retracting and longitudinally locking said slider (3) with respect to said hollow body (2) in said first blocking position,

by applying a second longitudinal withdrawal force (R2) on said slide (3) succeeding said second longitudinal thrust (P2), retract completely to unlock said slide (3) of said first position and allow its total withdrawal by report to said hollow body (2).

3. Fastening device (1) according to claim 1, characterized in that said locking means (19, 24, 27, 37, 38) comprise a flexible tab (37) provided with at least one cam follower (38). ) and a cam (19, 24, 27) carried by said slide (3), the other by said hollow body (2), said cam (19, 24, 27) having a central island (19). ) defining a guide path capable of guiding said cam follower (38) provided with an engagement portion for guiding said cam follower (38) upon engagement of said slider (3) in said hollow body (2) ) towards its first locking position, a clearance portion for guiding said cam follower (38) during removal of said slider (3) from said hollow body (2) after said second locking position, a recess (24) separating said engaging and disengaging portions and for receiving said cam finger (38) and defining said second locking position.

4. Fastening device (1) according to claim 3, characterized in that said cam (19, 24, 27) comprises a stop pin (27), longitudinally offset from said central island (19) and provided longitudinally in facing said recess (24), in that said slide (3) is arranged so that, in said first locking position, said cam finger (38) is longitudinally opposite said stop pin (27) and plated by said flexible tab (37) against said stop pin (27) which prevents its passage from said engagement portion to said clearance portion and thereby defines a waiting position of said cam finger (38).

5. Fastening device (1) according to claim 4, characterized in that said central island (19) comprises a flexible finger (23) arranged to prevent the introduction of said cam finger (38) into said clearance portion when engaging said slider (3) in said hollow body (2) and allowing the output of said cam follower (38) from said clearance portion upon removal of said slider (3) from said hollow body (2).

6. Fastening device (1) according to any one of claims 3 to 5, characterized in that said flexible tab (33) is carried by said slide (3) and in that said cam (19, 24, 27) is carried by said hollow body (2).

7. Fastening device (1) according to claim 1, characterized in that said slide (3) comprises two flexible jaws (28) defining between them a longitudinal recess (29) for receiving said object (100) and to block it between them by tightening to form said hooking means (30).

8. Fastening device (1) according to claim 1, characterized in that said hollow body (2) comprises at least one plate (8) extending laterally and intended to bear on said support plate (200), a flexible hook (1 1) laterally able to retract during the passage of said hollow body (2) in said engagement opening (201) and to deploy under said support plate (200) when said plate (8) is in support on said support plate (200) for locking said support plate (200) between said plate (8) and said flexible hook (1 1) and forming said anchoring means (8, 1 1).

9. Fastening device (1) according to claim 3, characterized in that said flexible tab (37) has an inverted T shape, in that the width of said rod of the T-shape is less than that of said jaws, in that the bar of said T-shape forming, on either side of said T-shaped rod, a cam follower (38), in that said hollow body (2) comprises two cams (19, 24, 27) provided on either side of a median plane of said hollow body (2), symmetrical to each other with respect to said median plane and each intended to receive one of said cam fingers (38).

10. Fastening device (1) according to claim 7, characterized in that said slider (3) is formed by a folded sheet, in that each jaw (28) has an inverted U shape whose ends of the inner limbs ( 31) are interconnected by a base (32) so as to define therebetween a U-shape defining said longitudinal recess (29), in that an outer leg (34) of a jaw (28). opposed to the other jaw (28) is extended longitudinally by a flat portion forming said flexible tab (37).

1 1. Fastening device (1) according to claim 10, characterized in that the free ends of each outer branch (34) of said inverted U-shape of each jaw (28) each comprise a flap (39) folded towards the inner branch ( 31) corresponding to said inverted U shape, in that the free ends of each inner leg (31) of said inverted U-shape of each jaw (28) each comprise a notch (40) housing said corresponding flap (39) and arranged for, when said slider (3) is subjected to said first, second longitudinal withdrawal force (R1, R2), receive the support of said flap (39) and prevent the unfolding of said outer branches (34) relative to said inner branches (31).

12. Fastening device (1) according to claim 10, characterized in that said slide (3) comprises at least one locking strip (41) extending from said base (32) defining said longitudinal recess (29) and arranged for, when said slider (3) is subjected to said first, second longitudinal withdrawal force (R1, R2), bear against the free ends of said outer limbs (34) and prevent the unfolding of said inner limbs (31) with respect to said limbs exterior (34).

13. Fixing device (1) according to claim 1, characterized in that the hollow body (2) comprises a first and a second body portion (41; 42) designed to be mounted or dismounted from one another .

14. Assembly of an object (100) on a support plate (200) provided with an engagement opening (201), characterized in that it comprises a fixing device (1) according to any one of the claims previous, said hollow body (2) being housed in said engagement opening (201) and secured to said support plate (200) by said anchoring means (8, 1 1), said object (100) being secured to said slider (3) by said hooking means (30).